Hadi Abubakar, author
Jakarta Djambatan 1991,
Buku Referensi
Shanglin A&C Limited, 2011
Buku Referensi
edited by Raymond J. Corsini
John Wiley & Sons, 1994
Buku Referensi
Kluwer Academic Publishers, 1995,
Buku Referensi
edited by C. Booth
Academic Press, 1971
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